5 Step Logarithm Dual LED Driver
CD7666GP
1.
CD7667/66GP
5dB 5dB 3dB 3dB 5 2
VCC = 6 ~ 12V
ICCQ = 4mA
VCC=9V
2.
2.1
DIP16
16 15 14 13 12 11 10
_...
Description
CD7666GP
1.
CD7667/66GP
5dB 5dB 3dB 3dB 5 2
VCC = 6 ~ 12V
ICCQ = 4mA
VCC=9V
2.
2.1
DIP16
16 15 14 13 12 11 10
_
A2 +
Vcc
+_C5
+_C4 +_ C3 +_ C2 +_ C1
9
Vcc
+ _ A1
_ + C5
_ __ _ + C4 +C3 + C2 + C1
8
1
2.2
1 2 3 4 5 6 7 8
2
IN1 OUT1A OUT15 OUT14 OUT13 OUT12 OUT11 GND
3 4567
1 1
15 14 13 12 11
9 10 11 12 13 14 15 16
VCC OUT21 OUT22 OUT23 OUT24 OUT25 OUT2A
IN2
21 22 23 24 25 2 2
14 0510 5807123-5506 13
0510 5803016
3.
3.1
LED
25 3.2
Tamb= 25
VCC IO VLED PD Tamb Tstg
1
14 30 15 750 -30 ~ 75 -55 ~ 150
6 mW
V mA V mW
Tamb= 25 VCC=9V f=1kHz
CD7666GP
ICCQ
VI =0
4 6 mA
IO
VCE =2V
15 20 30 mA
IOLE VI =0
50 uA
AV 12.6 dB
1
VILA
AV =12.6dB
-10.25
0
10.25 mV
VILA(5) VILA(4) VILA(3) VILA(2) VILA(1)
AV =12.6dB
189 212 238 mV 134 150 168 mV 89 106 126 mV 47 60 75 mV 24 34 47 mV
4.
VCC=9V 430 430 430 430 430
600 2
0.47uF 10k
1 SW1 4.7uF
43k
LED LED (25) (24)
LED LED LED (23) (22) (21)
16 15 14 13 12 11 10
9
Vin
1 SW2 4.7uF
12 43k
2 600
10k 0...
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